#!/bin/bash

# -------------------------------------------------------------------------- #
# Copyright 2002-2016, OpenNebula Project, OpenNebula Systems                #
#                                                                            #
# Licensed under the Apache License, Version 2.0 (the "License"); you may    #
# not use this file except in compliance with the License. You may obtain    #
# a copy of the License at                                                   #
#                                                                            #
# http://www.apache.org/licenses/LICENSE-2.0                                 #
#                                                                            #
# Unless required by applicable law or agreed to in writing, software        #
# distributed under the License is distributed on an "AS IS" BASIS,          #
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   #
# See the License for the specific language governing permissions and        #
# limitations under the License.                                             #
#--------------------------------------------------------------------------- #

# PREMIGRATE SOURCE DST remote_system_dir vmid dsid template
#  - SOURCE is the host where the VM is running
#  - DST is the host where the VM is to be migrated
#  - remote_system_dir is the path for the VM home in the system datastore
#  - vmid is the id of the VM
#  - dsid is the target datastore
#  - template is the template of the VM in XML and base64 encoded

SRC_HOST=$1
DST_HOST=$2

DST_PATH=$3

VMID=$4
DSID=$5

TEMPLATE_64=$6

#--------------------------------------------------------------------------------

if [ -z "${ONE_LOCATION}" ]; then
    TMCOMMON=/var/lib/one/remotes/tm/tm_common.sh
else
    TMCOMMON=$ONE_LOCATION/var/remotes/tm/tm_common.sh
fi

source $TMCOMMON

#--------------------------------------------------------------------------------

if [ "$SRC_HOST" == "$DST_HOST" ]; then
    log "Not moving $SRC_HOST to $DST_HOST, they are the same host"
    exit 0
fi

#--------------------------------------------------------------------------------

DST_PATH_DIRNAME=`dirname $DST_PATH`
DST_PATH_BASENAME=`basename $DST_PATH`

ssh_make_path "$DST_HOST" "$DST_PATH"

log "Moving $SRC_HOST:$DST_PATH to $DST_HOST:$DST_PATH"

ssh_exec_and_log "$DST_HOST" "rm -rf '$DST_PATH'" \
    "Error removing target path to prevent overwrite errors"

TAR_COPY="$SSH $SRC_HOST '$TAR -C $DST_PATH_DIRNAME --sparse -cf - $DST_PATH_BASENAME'"
TAR_COPY="$TAR_COPY | $SSH $DST_HOST '$TAR -C $DST_PATH_DIRNAME --sparse -xf -'"

exec_and_log "eval $TAR_COPY" "Error copying disk directory to target host"

migrate_other "$@"

exit 0
